obama along with the former president george w. bush will all attend the memorial service for nelson mandela on tuesday. wusa9 will be covering a week of tributes to nelson mandela, both here and in south africa. >>> i'm derek mcginty along with wusa9 photographer kevin king. we're checking in here at dulles international airport, headed to johannesburg, south africa, to bring you a series of reports leading up to the funeral for nelson mandela. the heart of south africa. we'll see you there. >> derek and kevin, already in the air for that long flight. i think it's about 17 hours to south africa. watch for their report starting on tuesday on wusa9 and wusa9.com. >>> when we come back, topper has the newest information on th >>> the district is now under a winter storm warning. but the threat, it's really freezing rain. snow is over and fleet over as well. temperatures, 27-31, north and west tonight. major icing is possible for them overnight north and west. but as close to the district as maybe bethesda or rockville or maybe mcclai